Core-chuck.



E. RJRIGH'ARDS.

GORE CHUCK.

APPLICATION FILED SEPT. 26, 1910.

v 1,()37,988 Patented Sept. 10, 1912.

ATTOR N BY FIG. I.

I I W k i h 6 WITNESSES IN VENTOR [27252 E.Kz'c/2ard& M

ERNST B. RIGHARDS, OF

CHICAGO, ILLINOIS, ASSIGNOR TO SEARS, ROEBUC AND ('10.,

OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

CORE-CHUCK.

Specification of Letters Patent.

Patented Sept. 10, 1912.

, i Application filed September 26, 1910. Serial No. 583,848.

To all whom it may concern Be it known that 1., Elmer R. RICHARDS, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Im rovementsin Core Chucks, of which the following is a specification.

' This invention relatejsto a chuck adapted to 100k a body to be rotatedto a rotary shaft or spindle.

Ihe invention is especially adapted for looking a core upon which a rollof paper is wound to a suitable shaft or spindle so that the paper woundon the core may be unwound, or for the purpose of winding paper upon thecore by rotation of said shaft.

One of the objects of this invention is to produce a chuck which may beroughly adjusted with relation to the object to-be rotated, and whichwill automatically tighten against said object upon rotation of one ofsaid parts.

- Another object of the invention is to produce' a chuck of thecharacter described which is simple, strong, cheaply manufactured andvery durable.

Other objects and advantages will become apparent as the invention isbetter under- "stood from the following detailed description.

In the accompanying drawings, Figures 1 and 2 are, respectively, end andside elevations of one member of a chuck embodying the features of myinvention. Figs. 3 and a are, respectively, side and end elevations ofanother member of the chuck. Fig. 5 is an elevation, partly in section,showing one .manner of using my invent-ion.

I have herein shown the invention as used for locking a hollow core A toa rotary shaft B for the purpose of permitting a roll of paper C uponthe core A to be unwound, or for the purpose of winding pa'per upon saidcore by rotation of the shaft B. It will be understood that, in eithercase, a suitable support, having bearings for the shaft B will beprovided, and if a roll of paper is to be unwound, suitable tensionmeans may be connected with the shaft so that the paper will be unwoundunder the desired tension. I have deemed it unnecessary to illustratethe elements last mentioned, inasmuch asthey are well known and may beof any desired or preferred construction.

A chuck embodying my invention is partion depending upon ticularly welladapted, on account of its strength and durability, for use in connetion with the large and heavy rolls of paper used by printingestablishments.

Referring to Fig. 5, the chucks at opposite ends of the figure areidentical in construction, with the exception that in one the spiralfaces, to be later described, are righthand, while in the other they areleft-hand. In the form herein shown by way of example, the chuckcomprises a member 1 rotatably mounted upon, and slidable longitudinallyof the shaft B, said member having a conical or tapered end 2 which isadapted toenter one end of the core A. A suitable lug orkey 3 upon theconical end 2 of the member is arranged to enter a notch a in the coreA. so that said core and member will rotate together. A member 4 fittingupon the shaft B has one or more screwthreaded openings 5 therein, inwhich openings are threaded set screws 6 adapted to engage the shaft Bfor the purpose-of positively locking the member 4 against movement withrelation to said shaft. The adjacent faces of the members 1 and 4c arespiral, said faces in the present instance representing one completeconvolution of the spiral. It will be seen that when the core A isrotated in one direction to unwind the paper therefrom, the members 1owing to the engagement of the key 3 in the notch 11' will rotate withthe core. Assuming that the shaft B is under some tension as aboveexplained, the section l of the chuck will not rotate. As the section 1rotates, thcncam action of the contacting spiral faces on the sectionswill cause the section 1 to slide inwardly along the shaft B intoengagement with the end of the core A. When the force pressing thesections 1 inwardly equals the tension. force holding the shaft B, thecore A, the chucks and the shaft B will rotate as a unit. The spiralfaces of the chuck sections are perpendicular to the axis of the shaft Bat all points, so that all force transmitted to the members 1 will bedirectly along the axis of said shaft. In a similar way rotation of theshaft B in the proper direction to wind up paper on the core will causethe spiral facero n the member 4 to move the member 1 longitudinally ofthe shaft B, and into gripping engagement with the core A, the strengthof the gripping acthe amount of resi butit is obvious that one of thesechucks.

member for securing the first mentioned member against rotation on theshaft, the adjacent faces of said members being of spiral formation; andclamping means on 30 said shaft opposite the sliding member.

2. The combination of an'otary shaft, a hollow core surrounding theshaft, and a chuck carried by said shaftat each end of t e; core, eachof said chucks comprising a 35 sec ion fixed to the shaft and a sectionr0- tattably and slid'ably mounted on the shaft, the latterfsectiombeing cone shaped at one a'nce to rotation offered by the roll of paperIn the present instance I have snown two of the chucks, one at each endof the core;

may be displaced by a chuck of solid construction, the result beingmerelythe dif; ference in the amount of automatic adjust ment which itwill be possible to-"obtain It may also be seen that the core A may beof solid construction, the members 1 of the chucks being engaged withthe core in any suitable Way. In, the case just mentioned, the shaft Bwould be displaced .by spindles upon the ends of which the chucks wouldbe I mounted; saidsections and being of cam formation, Whe'jrebyrelative rotation of said sections :will-fo'rce the second mentionedsection into ICOIG.

In testimony whereof I aflix my signature m pnesence of two witnesses.

vention. I therefore do not limit myself to the details herein shown anddescribed.

claim as my invention:

1, The combination of a rotary shaft; a ERNST RJRICHARDS. member munted-on said shaft; a member- \Vitnesses: slidably and rot-atablymounted upon said E. LENNOX, shaft; means independent of the slidableWM. 'PETTIGREW.

I Copies of this patent maybe obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

core, the adjacent facesof said sections ex- 40' ,engagementwiththee-adjacent end of said 45

